Search Results for author: Malte Krack

Found 8 papers, 0 papers with code

On the locomotion of the slider within a self-adaptive beam-slider system

no code implementations12 Mar 2024 Florian Müller, Malte Krack

In the present work, first, an analytical approximation of the beam's response on the slow time scale is derived as function of the slider position, which is a crucial prerequisite for identifying the main drivers of the slider's locomotion.

Position

Robust and fast backbone tracking via phase-locked loops

no code implementations11 Mar 2024 Patrick Hippold, Maren Scheel, Ludovic Renson, Malte Krack

For phase detection, an adaptive filter based on the LMS algorithm is used, which is shown to be superior to the synchronous demodulation commonly used.

Computational and experimental analysis of the impact of a sphere on a beam and the resulting modal energy distribution

no code implementations2 Jul 2022 Felix Gehr, Timo Theurich, Carlo Monjaraz-Tec, Johann Gross, Stefan Schwarz, Andreas Hartung, Malte Krack

The measurements are confronted with predictions obtained using two different approaches, state-of-the-art Finite Element Analysis and a recently developed computational approach involving a reduced-order model.

Nonlinear damping quantification from phase-resonant tests under base excitation

no code implementations10 May 2022 Florien Müller, Lukas Woiwode, Johann Gross, Maren Scheel, Malte Krack

In the case of shaker-stinger excitation, the applied excitation force is commonly measured in order to quantify the amplitude-dependent modal damping ratio from the phase-resonant test data.

Friction

Development of a Fully-Coupled Harmonic Balance Method and a Refined Energy Method for the Computation of Flutter-Induced Limit Cycle Oscillations of Bladed Disks with Nonlinear Friction Contacts

no code implementations11 Feb 2021 Christian Berthold, Johann Gross, Christian Frey, Malte Krack

The currently available simulation methods for blade flutter account for nonlinear interactions, at most, in only one domain, the structure or the fluid, and assume the behavior in the other domain as linear.

Computational Engineering, Finance, and Science

Experimental assessment of polynomial nonlinear state-space and nonlinear-mode models for near-resonant vibrations

no code implementations17 Nov 2020 Maren Scheel, Gleb Kleyman, Ali Tatar, Matthew R. W. Brake, Simon Peter, Jean-Philippe Noël, Matthew S. Allen, Malte Krack

The second methodology exploits uncontrolled experiments with broadband random inputs to build polynomial nonlinear state-space models using advanced system identification tools.

Cantilever Beam

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